You may have noticed that the green lines in the price charts is no longer a straight line in many cases. This has been requested by many members over the years. We have expanded it to include a 4th order polynomial regression. For example, http://www.expressobeans.com/public/detail.php/81257
. This should help improve everyone's ability to see the trends.
However as with any other statistical model, it does not always do what you might think it should. Don't be surprised to see it bottom or top out on the graph in cases where the data is excessively clumped in one time period. It is like a big rubber hose in that if there is enough force on one part it will sway the rest of the hose wildly at times.
This project, like the Naruto
project, has been open sourced as the "Sake"
project at Source Forge.